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The long, err, short of it
Date:3/25/2012

BOSTON, MANo one really wants the short end of the stick, in this case the short end of a chromosome. Telomeres, which are DNA-protein complexes at the ends of chromosomes, can be thought of as protein "caps" that protect chromosomes from deteriorating and fusing with neighboring chromosomes.

It is typical for telomeres to shorten as cells divide and chromosomes replicate over time. Now a new study from Brigham and Women's Hospital (BWH) suggest a strong link between telomere shortening and poor cardiovascular outcomes in patients with acute coronary syndrome.

The study is being presented at the American College of Cardiology 2012 Annual Scientific Session, March 24 to 26 in Chicago.

Scientists measured telomere length in 5,044 patients with an acute coronary syndrome who were followed for 18 months.

They evaluated the risk of cardiovascular death or heart attack based on telomere length and other characteristics.

Shorter telomeres were associated with older age, male gender, smoking, prior heart attack and heart failure; although, the correlation between each individual factor and telomere length was modest. Age, for example, only accounts for seven percent of the variability in telomere length.

Telomere length was strongly associated with risk of cardiovascular death or heart attack. Patients with shorter telomeres had the highest risk. This relationship was consistent across various age groups.

"We know that many different genetic and environmental factors, like diabetes, high cholesterol and smoking predispose patients to suffering cardiovascular events," said Christian T. Ruff, MD, MPH, Cardiovascular Division, BWH Department of Medicine, and lead study investigator. "Even when accounting for all of these other known risk factors, patients with short telomeres have an increased risk of having a heart attack or dying from heart disease."

Taking the research findings from bench to b
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Contact: Marjorie Montemayor-Quell
mmontemayor-quellenberg@partners.org
617-534-2208
Brigham and Women's Hospital
Source:Eurekalert

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